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AMD IOMMU: add necessary header defines for stats counting

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Impact: add defines to make iommu stats collection configurable

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2008-12-12 12:33:06 +01:00
parent 2e117604a4
commit a9dddbe049
1 changed files with 26 additions and 0 deletions
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26
arch/x86/include/asm/amd_iommu_types.h
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@ -396,4 +396,30 @@ static inline u16 calc_devid(u8 bus, u8 devfn)
return (((u16)bus) << 8) | devfn; return (((u16)bus) << 8) | devfn;
} }
#ifdef CONFIG_AMD_IOMMU_STATS
struct __iommu_counter {
char *name;
struct dentry *dent;
u64 value;
};
#define DECLARE_STATS_COUNTER(nm) \
static struct __iommu_counter nm = { \
.name = #nm, \
}
#define INC_STATS_COUNTER(name) name.value += 1
#define ADD_STATS_COUNTER(name, x) name.value += (x)
#define SUB_STATS_COUNTER(name, x) name.value -= (x)
#else /* CONFIG_AMD_IOMMU_STATS */
#define DECLARE_STATS_COUNTER(name)
#define INC_STATS_COUNTER(name)
#define ADD_STATS_COUNTER(name, x)
#define SUB_STATS_COUNTER(name, x)
#endif /* CONFIG_AMD_IOMMU_STATS */
#endif /* _ASM_X86_AMD_IOMMU_TYPES_H */ #endif /* _ASM_X86_AMD_IOMMU_TYPES_H */